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M. C. A LATOUR.

RADIOSIGNALING INSTALLATION.

APPLICATION FILED NOV. 15 1917.

1 ,3 1 7,025. Patented Sept. 23, 1919.

' K ABIUS C. A. LLTOUR, F PARIS, FRANCE.

mrosreminme INSTALLATION.

Specification 0! Letters Patent.

Application filed lioveniber 15,1917. Serial No. 202,282.

' To all whom it may concern:

Be it known that I, MARIUS C. A. LATOUR, a citizen of the Republic of France, residing at Rue Auber, Paris, in the Republic of France, have invented certain new and useful Improvements in Radiosignaling Installations, of which the following is a specification.

The invention relates to a device enabling the fundamental wave length of an antenna of radio telegraphic or radio-telephonic staaugmented.

It consists in distrlbuting several selfinduction coils along the antenna wires.

Although it is very usual in radiotelegraphy to place large inductances at the base of the antennae, and although several inventors have suggested placing'self-induction coils at the top of the antennae, a plurality of self-induction coils have never yet been distributed along the same wire in order to increase the wave length of the said wire.

It is possible however to distribute selfinduction' coils in this wa along the antenna wire, even under conditions compatible with the mechanical overloading that the said self-induction coils will impose on the antenna wire. With this end in view these coils may be arranged in the neighborhood of transverse bearers, but on the other hand the may be constructed in such a way as to tie extremely light.

The drawings given by way of example show one of the constructional forms of the invention. Figure 1 shows a portion of an antenna in sheet form in the wires of which several self-induction coils 1 have been distributed.

These self-induction coils will preferably be constructed with magnetic circuits of iron or any other magnetic material.

Fig. 2 gives an example of a method of Patented Sept. 23, 1919.

constructing these self-induction coils. They may consist merely of sheet iron disks 3 threaded on to the antenna wire 2, but are otherwise insulated from one another by means of a coating of varnish or other suitable insulating material.

In a general way that quality of sheet iron will be employed which gives the lowest losses b hysteresis and by Foucault currents (p ates of silicon iron, of iron cast in a vacuum, etc.)

What I claim and desire to secure by Letters Patent of the United States is: v

1. In a radio signaling installation, an antenna, and means for increasing the wave length thereof, comprising a plurality of uncompensated inductances distributed along said antenna and including eacha plurality of metal disks connected to said antenna, but otherwise insulated from one another.

2. In a radio signaling, installation, an

antenna having a plurality'qf self-induction coils distributed along its wires, each induction coil comprising a, plurality of sheetiron disks threaded upon the antenna wire, butotherwise insulated from one another for the purpose specified.

In testimon whereof I afiix my signature in presence 0 two witnesses.

. MARIUS O. LATOUR. Witnesses:

' EUGENE PRESSLY,

CHAS. P. PRESSLY." 

